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Viewing changes to TuxGuitar/src/org/herac/tuxguitar/gui/undo/undoables/UndoableJoined.java

  • Committer: Bazaar Package Importer
  • Author(s): Philippe Coval
  • Date: 2008-06-19 00:30:30 UTC
  • mto: (5.1.2 sid)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20080619003030-h719szrhsngou7c6
Tags: upstream-1.0
Import upstream version 1.0

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TuxGuitar/src/org/herac/tuxguitar/gui/undo/undoables/UndoableJoined.java
 
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package org.herac.tuxguitar.gui.undo.undoables;
 
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import java.util.ArrayList;
 
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import java.util.List;
 
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import org.herac.tuxguitar.gui.undo.CannotRedoException;
 
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import org.herac.tuxguitar.gui.undo.CannotUndoException;
 
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import org.herac.tuxguitar.gui.undo.UndoableEdit;
 
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public class UndoableJoined implements UndoableEdit{
 
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        private int doAction;
 
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        private UndoableCaretHelper undoCaret;
 
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        private UndoableCaretHelper redoCaret;
 
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        private List undoables;
 
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        public UndoableJoined(){
 
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                this.doAction = UNDO_ACTION;
 
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                this.undoCaret = new UndoableCaretHelper();
 
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                this.undoables = new ArrayList();
 
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        }
 
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        public void addUndoableEdit(UndoableEdit undoable){
 
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                this.undoables.add(undoable);
 
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        }
 
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        public void redo() throws CannotRedoException {
 
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                int count = this.undoables.size();
 
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                for(int i = 0;i < count;i++){
 
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                        UndoableEdit undoable = (UndoableEdit)this.undoables.get(i);
 
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                        undoable.redo();
 
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                }
 
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                this.redoCaret.update();
 
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                this.doAction = UNDO_ACTION;
 
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        }
 
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        public void undo() throws CannotUndoException {
 
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                int count = this.undoables.size();
 
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                for(int i = (count - 1);i >= 0;i--){
 
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                        UndoableEdit undoable = (UndoableEdit)this.undoables.get(i);
 
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                        undoable.undo();
 
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                }
 
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                this.undoCaret.update();
 
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                this.doAction = REDO_ACTION;
 
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        }
 
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        public boolean canRedo() {
 
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                return (this.doAction == REDO_ACTION);
 
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        }
 
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        public boolean canUndo() {
 
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                return (this.doAction == UNDO_ACTION);
 
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        }
 
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        public UndoableJoined endUndo(){
 
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                this.redoCaret = new UndoableCaretHelper();
 
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                return this;
 
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        }
 
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}